Membership Summit Automatic Timeline Planner (link)
It takes several months of lead time to effectively plan and execute a Membership Summit. The most important critical path item is getting started early enough on a promotional campaign. Here is a handy calculator that will help you quickly create a timeline for your Summit planning.
When the sheet opens, look for your District’s tab at the bottom. Look for the empty cell marked Enter Summit Date >>>. Enter that one date, and everything else is calculated for you. You can highlight, copy and paste that table into whatever planning document you're using and adjust it as your Summit plan evolves.